Datasheet Details
| Part number | HC257 |
|---|---|
| Manufacturer | Hitachi Semiconductor (now Renesas) |
| File Size | 52.59 KB |
| Description | Quad. 2-to-1-line Data Selectors/Multiplexers(with noninverted 3-state outputs) |
| Datasheet |
 HC257 Datasheet
|
|
|
General Description
The large output drive capability coupled with the 3-state feature make this device ideal for interfacing with bus lines in a bus organized system.
When the output control input line is taken high, the outputs of all four multiplexers are sent into a high impedance state.
Key Features
- High Speed Operation: tpd (Data to Y) = 10.5 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Inputs Output Control L L L L H Select L L H H X A L H X X X B X X L H X Outputs Y L H L H High impedance Notes H: high level, L: low level, X: irrelevant HD74HC257 Pin Arrangement Select.